Machine for coating cardboard and other materials



June 10, 1924. v

A. POTDEVIN 4 MACHINE] FOR COATING CARDBOARD AND OTHER MATERIALS 2 b heets Filed July 28. 1921 Irw en'ton Z'devn,

50h j 0/M .5 Wyn June 10, 1924., 1,497,196

A; POTDEVIN momma FOR COATING CARDBOARD AND OTHER MATERIALS Filed J ly 28 1921 2 Sheets$heet 2" Patented June 10, 1924.

UNITED STATES ADOLIH POTDEVIN, 0F BROOKLYN, NEW YORK. ASSIGNOR TO POTD'EVIN MACHINE COMPANY, OF NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

Application filed July 28,

To all whom it may concern:

Be it known that I, AooLPH POTDEVIN, a citizen f the United States, and resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Machines for Coating Cardboard and Other Materials, of which\ the following is a specification.

This invention relates to machines for applying coating in a liquid state to the surface of cardboard and other materials; having reference more especially to that class of machines wherein a roll or drum is mounted to rotate within and above a tank containing the coating liquid, the peripheral surface of such roll or drum being partly immersed in the contents of the tank and being adapted in its rotation to transfer the liquid in a film or layer to an opposing surface.

An object of my invention is to provide a simple and efiicient construction whereby a smooth and uniform application of the liquid to the cardboard or other material is effected.

Another object is to provide means whereby the liquid contents of the tank are kept constantly in circulation in such a manner as to insure a substantially even level as well as the uniform viscosity of the liquid within the tank preparatory to the removal of the liquid by the rotating roll.

With these objects in view my invention comprises novel features of construction and combinations of parts which will be hereinafter described and claimed.

In the drawings-,-

Figure 1 is an end elevation of a coating machine to which my invention is applied, said machine being illustrated as one for coating cardboard with glue.

Fig. 2 is a transverse vertical section of the machine, indicating the circulation of the liquid contents of the tank.

Fig. 3 is a longitudinal vertical section of the machine onthe line 3-3 of Fig. 2.

Fig. 1 is a section similar to Fig. 2, but showing a modified form of the diverter.

Referring to the drawings, 5 designates an elongated tank adapted to contain glue or other liquid coatin substance; and 6 designates a transfer r0 1 which is journaled in bearings in the ends of thetank in such 1921. Serial N0. 488,158.

and have their free ends connected to re-' tracting springs 9. Set-screws 9' fitted in the arms and contacting with the ends of the tank provide means for vertically adjusting the arms and the roll 7.

10designates a doctor roll adapted to distribute and regulate the thickness of the liquid on the surface of the roll 6. This a roll is illustrated as carried by a pair of upstanding rock-arms 11 which are pivoted on the respective ends of the tank; a setscrew 12 in the adjacent side wall of the tank being provided to effect minute adustment of the roll 10 in respect to the surface of the roll 6.

The shaft of the roll 6 is provided with a spur wheel 13 which meshes with a pinion let loose on an adjacent stud shaft 15 extending fromv one end of the tank, and with a pinion 16 fast on the shaft of the roll 10. Fast on the pinion 14 is a pulley l7 and also fast on the shaft of the pressure roll 7 is a pulley 18. About these pulleys is flexed a belt'19 which is driven from a suitable source of power. Thus motion is directly transmitted by the belt to the pulleys 17, 18; the rolls 6, 10 are driven through the gearing from the pulley 17, and the pressure roll 7 partakes of the rotation of the pulley 18. The ratio of the gearing is such that the surface speed of the pressure roll exceeds that of the transfer roll 6. When the transfer and pressure rolls, and. in consequence, the interposed sheet, are driven at the same surface speed the film of liquid carried up by the transfer roll has a tendency to drag and spread rearwardly upon the under sur face of the sheet, particularly when glue is being applied to material of relatively heavy texture; but by increasing the speed of the pressure roll above that of the transfer roll as above mentioned, the movement of the sheet is correspondingly accelerated, and

come,

e feed and pressure roll is be employed to a terial at a greater surface transfer roll.

hen a coating, substance of high viscosity or of heavy body is used, the trans ferroll. and pile up the substance in the front or doctor roll end of the tank; such substance in some cases overflowing the tank. obviate this objection slightly below peripheral sur- This 4 positioned and parallel with the lower face of the roll 6, as seen in Fig. 3.

I 18 carried thereby through the longitudinal space beface and the diverter, and an upper current toward the rear wall of the tank is thus established, which current is thence directed downwardly and low in a return path through the space below the diverter; whereupon current is directed the surface of the transfer roll, and This circulation of the liquid continues durng the rotat I ience a substantially even level as well as uniform consistency of the liquid within he tank is maintained.

ls to advance 3 l have illustrated the form of a iorizontal flat and in Fig. 4 I have indicated d upwardly ex- (1 and curved. do not limit my invention to th machine illustrated, at construction e par nor to herein machines and principle of the he scope of the appended I claim-- In a coating machine, the 01 a tank for liquid coating material, a roll lower surface constructed and arranged latively narrow space be tween said member and the roll, and a relwide space between said member bottom of the tank.

diverter extending longitudinally of and in spaced relation to tie path of rotation of the immersed surace of the roll.

tank, tending longitudinallv o lation to th lower circulation spaces for the liquid.

lyn, in the York, this 16th day ADOLPH POTDE V] N.

State of New of July, A. D. 1921. 

